Schrader of Braunschweig and Hamburg Germany

I am researching the Schrader line from braunschweig, germany and would like to know if anyone has the parents of johann heinrich christian schrader born abt 1800. He is married to christiane Sophie Henriette brandes and has a 2nd wife Anna Catharina Sophie Gerike.

I am also searching for Herman Friederik Schrader's parents. He was born abt 1813 in Hamburg Germany. He was married to Maria Christina ?